Island



(No Model.) l,

C. D. ROGERS. E EADED BOLT 0E soEEW.

No. 461,621. Patented Oct. 20. 1891.

Gig"

WITNEESES. INVEN'TDB. CFM@ U'Nrrn STATES CHARLES D. ROGERS, OE PROVIDENCE, RHODE ISLAND, ASSIGNOR TO THE AMERICAN SCREW COMPANY, OF SAME PLACE.

H EADl-:D BOLT R SCREW.

SPECIFICATION forming part of Letters Patent No. 461,621, dated October 20, 189].

Application filed April 18, 1891. Serial No. 389,492. `(No modal.)

To all whom t may concern:

Be it known that I, CHARLES D. ROGERS, a citizen of the United States, residing at'Providence, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Headed Bolts or Screws; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

Tire-bolts as usually made, particularly those having cut screw-threads, have been provided with a plain shank portion having a head at one end and a screw-threaded portion at the other. Sometimes the periphery of the shank portion intermediate of the head and threaded portions has been provided with a series of longitudinally-arranged grooves and ribs. An example of a tire-bolt of this type is set forth in a patent of the United COSS.

States, No. 440,331, issued to me November 11, 1890, the bolts just referred to being produced by what is termed the rolling pro- In that case the flutes or ribs terminated at the base of the bolt-head. An obj ection may be urged against the use of a tirebolt thus made, because its strength is impaired at the junction of the head and shank by reason of such prolongation of the grooves and ribs. Another objection is that the tire itself, when in use, extends beyond or below the base of the bolt-head a short distancesay one-eighth of an inch or soand as the wearing-surface -of such portion of the bolt is limited to the face of the ribs in contact With the tire it follows that the jarring action produced by the wheel in vrunning will have a tendency to disturb the libers of the metal in a direction transversely of the bolt, thereby reducing its diameter, the bolt then nolonger filling the hole in the tire.

In order to overcome the objections which may be made against iiuted tire-bolts, I have devised one wherein the head and the adjacent portion of the shank are rendered portion and a plain or un tinted part uniting the head and uted portions, the diameters of the said plain fluted and screw-threaded 5 5 portions being substantially alike.

In the appended sheet of drawings, Figure l is a side elevation of a tire-bolt embodying my improvement. Fig. 2 is a sectional view of the tire and felly of the wheel enlarged, 6o

showing the bolt as in use. Fig. 3 is a longitudinal central sectional View taken through the upper portion of the bolt. Fig. 4 is a cross-sectional view taken through the plain or unluted portion of the shank, as on line an of Fig. l; and Fig. 5 is asimilar sectional viewY taken on line y y of Fig. l.

I would state that the bolt herein shown and described is adapted to be produced by swaging or what is known as the rollingf pro- 7o cess-that is, the headed blanks are introduced singly between a pair of suitably-arranged reciprocating dies provided with ribs and grooves, which at one and the same time impress or form the screw-threads and flutes into the blanks surface, the diameter 0f the entire shank portion of the nished bolt exceeding that of the Wire or blank from which it was formed. This is due to the action of the dies, which in operation seize upon the 8o blank and force the metal from its lsurface in a radial direction, the length of the bolt being substantially the same as that of the blank from which it is made. A corresponding enlargement of the unfluted portion of tion a3, communicating with the fluted portion a2 and head h. It will be seen, referring to Fig. 3, that the vgrooves do not terminate abruptly, but gradually decrease in depth, as

at m. It will also be seen that my improved bolt is stronger at the junction of the shank roo and head than my patented bolt before referred to, because it has an additional amount of metal equal to the sum of the cross-sectional areas of the several grooves.

The shank por- 9o My improved bolt is clearly represented as in use. (See Fig. 2, wherein f indicates, sectionally, a portion of a wooden felly of a carriage-wlieel, and i5 the iron tire thereof.) A hole is drilled through the tire and wood to snugly receive the shank ci of the bolt, the

tire itself being counterbored to receive the bolts head. Now upon driving the bolt lioine it Will be found that the ungrooved portion a3 of the shank will be in close contact with the hole formed in the tire, and at the same time more or less of the iibers of the wood will expand into the grooves ot the luted portion f1.2 of the shank, thereby checking any tendency of the bolt to turn on its axis. An exterior washer w and nut n, serve, as common, to hold the bolt in position. The fiutings may be iliade parallel with the axis of t-he bolt or at a slight inclination therewith, as desired. The form of the tlutings cross-sectionally may also be varied or modified Without departing` from the spirit of the invention. I would st ate that, practically, I prefer to make the diameter of the screw-threaded portion of the shank L a little less than the diameter of the fluted part., in order that the end portion of the bolt may not disturb the fibers of the wood while it is being inserted into the telly.

lVitliout departing' from the spirit ot' the invention, iny improvement is equally well adapted to other types ot bolts and screws-- that is to say, the luted portion a2 of the screw-threaded shank may, as hereinbefoi'e described, terminate in the plain or uiifiuted portion a3, the latter uniting the tinted and headed portions of such bolts and screws.

I claim as my inventionl. A rolled or swaged headed bolt or screw having a portion of its shank oi' stem screwthreaded and iiuted and having that part of the shank contiguous to and uniting thehead and tinted portions plain or ungrooved, substantially as hereinbefore described.

2. A headed bolt or screw having its shank provided at its enteringr end with screwthreads, the portion of the shank extendingr rearwardly from the scre\\'-threaded parl'. provided with ribs and grooves to form flutings, and the portion between and uniting the head and said luted part being plain or unluted, the diameter of the shank beingsubstantially uniform throughout its length.

In testimony whereof I have afxed my signature iii presence ot two witnesses.

CHARLES D. ROGERS.

Vtiicsses:

CHARLES IIANNIGAN, Gao. H. REMINGTON. 

